#include <iostream>
#include "Common.hpp"
#include "InetAddr.hpp"

void Usage(std::string proc)
{
    std::cerr << "Usage: " << proc << "server_ip server_port" << std::endl;
}

// ./tcpserver server_ip server_port
int main(int argc,char *argv[])
{
    if(argc != 3)
    {
        Usage(argv[0]);
        exit(USAGE_ERR);
    }
    std::string server_ip = argv[1];
    uint16_t server_port = std::stoi(argv[2]);

    //1. 创建套接字
    int sockfd = socket(AF_INET,SOCK_STREAM,0);
    if(sockfd < 0)
    {
        std::cerr << "socket error" << std::endl;
        exit(SOCKET_ERR);
    }
    //2. bind需要绑定吗？
    // 需要，但不需要显示绑定，因为在客户端在连接服务器的过程中，客户端会自动与服务器bind,使用随机端口方式
    //只需要客户端连接服务器即可
    InetAddr server(server_ip,server_port);
    int n = connect(sockfd,server.NetAddrPtr(),server.NetAddrLen());
    if(n < 0)
    {
        std::cerr << "connet error" << std::endl;
        exit(CONNECT_ERR);
    }

    //3. echo client
    while(true)
    {
        std::string line;
        std::cout << "Please Enter@ ";
        std::getline(std::cin,line);

        write(sockfd,line.c_str(),line.size());

        char buffer[1024];
        ssize_t size = read(sockfd,buffer,sizeof(buffer)-1);
        if(size > 0)
        {
            buffer[size] = 0;
            std::cout << "server echo# " << buffer << std::endl;
        }
    }

    close(sockfd);
    return 0;
}